Note 12 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	No. of			Weighted Average
	Shares			Exercise Price
Outstanding December 31, 2013		1,114,058		$	5.76
Granted		397,218			8.30
Exercised		(360,318	)		5.70
Lapsed		(20,400	)		7.92
Cancelled		(12,500	)		6.43
Outstanding December 31, 2014		1,118,058		$	6.63
Granted		153,618		$	18.11
Exercised		(309,230	)		6.90
Lapsed		(10,900	)		6.00
Cancelled		(5,000	)		11.22
Outstanding December 31, 2015		946,546		$	8.39

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Range of Exercise Price			Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price
$3.82	-	$4.71		53,166		3.39	$	4.44
$5.55	-	$7.36		665,722		2.41	$	6.37
$7.96	-	$18.66		227,658		4.86	$	15.20
$3.82	-	$18.66		946,546		3.06	$	8.39

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

	No. of			Weighted Average
	Shares			Exercise Price
Outstanding December 31, 2013		452,812		$	5.76
Granted		137,382			7.36
Exercised		(68,170	)		5.85
Lapsed		-			-
Cancelled		-			-
Outstanding December 31, 2014		522,024		$	6.17
Granted		53,292		$	18.66
Exercised		(193,750	)		5.73
Lapsed		-
Cancelled		-
Outstanding December 31, 2015		381,566		$	8.14

Schedule of Share-based Compensation, Activity [Table Text Block]

Range of					Weighted Average Remaining		Weighted Average
Exercise Price			SARS		Contractual Life (Years)		Exercise Price
$5.62	-	$7.36		328,274		1.93		$6.43
	$18.66			53,292		4.08		$18.66
$5.62	-	$18.66		381,566		2.23		$8.14

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	SARS		Options
Exercise price
2015		$18.66	$16.78	-	$18.66
2014		$7.36	$7.36	-	$10.38
Market price
2015		$18.66	$16.78	-	$18.66
2014		$7.36	$7.36	-	$10.38
Risk free interest rate 1
2015		1.5%	1.5%	-	2.1%
2014		1.5%	1.5%	-	2.6%
Expected award life (years) 2		5	5	-	10
Expected volatility 3
2015		34.9%	34.9%	-	39.0%
2014		42.5%	37.3%	-	42.5%
Expected dividend yield 4
2015		1.6%	1.6%	-	1.9%
2014		3.7%	2.9%	-	3.7%